Centrifugal operating means for fuses



Feb. '13, 1940. H. JUNGHANS CENTRIFUGAL OPERATING MEANS FOR FUSES Filed July 23, 1937 fo r-ne Patented Feb. 13, 1940 UNITED STATES PATENT OFFICE CENTRIFUGAL OPERATING MEANS FOR FUSES Helmut Junghans, Schramberg-Sulgen, Germany Application July 23, 1937, Serial No. 155,333

In Germany July 23, 1936 3 Claims. (Cl. 102-36) This invention relates to centrifugal drive deits projection e against the weight b and assists vices for projectile fuses and to a ,device of this the outward movement of the latter for such kind having means for keeping the driving force time as the secondary weight d has not reached constant during the whole period of flight, it the extreme position shown in Fig. 3. When,

i being known that this force increases with inhowever, this movement has been completed 5 creasing distance of a centrifugal weight from the weight d remains stationary and the prithe axis of the projectile. mary weight b continues to move outwards, the

It has been proposed to provide an auxiliary projection c passing out of engagement 'and the centrifugal weight to compensate the varying effect of the auxiliary force of the secondary driving force of a driving centrifugal weight, weight d on the primary weight b then ceasing.

which auxiliary weight, particularly at the be- What I claim as new and desire to SBCLJG by ginning of projectile flight when the force ex- Letters Patent is: erted by the main weight is still small, assists the 1. In a time fuse for a projectile, a drive shaft latter but later when said force has increased, for the timing mechanism of said fuse, a pivot 1 diminishes this assistance in a manner to main member stationary with respect to the fuse, a

tain the driving force constant. driving segment including a primary centrifugal The object of the invention is to provide a weight mounted on said pivot, a lever member mutual arrangement of main a d auxiliary including a secondary weight on one end thereof weights such that when the main weight has freely mounted on said pivot, and means contraversed a certain distance the auxiliary weight necting said driving segment to said drive shaft is automatically rendered inoperative thereby. for actuating the same, the other end of said A further object of the invention is to provide lever having means thereon constructed and aran extremely simple arrangement of main and ranged to bear on said primary weight under auxiliary weights occupying min mum Spa centrifugal forces caused by rotation of said The sma ler th space occupied y a m n w i projectile upon firing whereby both weights actuand ts aux y Weight, the e sets of Wei ts ate the drive shaft, until said secondary weight can be used, the caliber of the project being swings said lever to a maximum throw position, the same. said segment and primary weight moving there- An embodiment of the invention is illustrated after on said pivot alone to actuate the drive by way of example in the accompanyin draW- shaft whereby a substantially uniform drive is ing. effected.

1 is a P View Of the fuse Operating 2. In a time fuse for a projectile, a drive shaft mechanism in t Position of t w the for the timing mechanism of said fuse, a pivot jectile is fired. member stationary with respect to the fuse, a

F 2 is a Similar View in the Operative Position driving segment including a primary centrifugal S y before the secondary We g iS released weight mounted on said pivot, a lever member from the primary weight. including a secondary weight on one end thereof Fig. 3 is a S ar e Of the Operating mechfreely pivoted on said segment, and means conanism with the Secon y weight disconnected meeting said driving segment to said drive shaft from t e pr ary Weight and located in the for actuating the same, the other end of said extreme position. lever having means thereon constructed and ar- The toothed seg e a Which iS pivoted at a ranged to bear on said primary weight under and drives the mechani y y Of the toothed centrifugal forces caused by rotation of said Shaft f, carries the P a y centrifugal Weight projectile upon firing whereby both weights actu- About the same pivot a there is mounted a lever ate the drive shaft, until said secondary weight c, which carries the seco y weight d and swings said lever to a maximum throw position, POSSeSSeS at the ppos end a Projection by said segment and primary weight moving theremeans of which the eve 0 bears against the after on said pivot alone to actuate the drive p y Centrifugal Weight b When the Operating shaft whereby a substantially uniform drive is mechanism is in the condition of rest. effected.

The operation of the embodiment shown in the 3. In a time fuse for a projectile, a drive shaftdrawing is as follows: for the timing mechanism of said fuse, a. pivot When the projectile is fired the lever c, owing member stationary with respect to the fuse, a to the secondary weight 41 located well away driving segment including a primary centrifugal from the centre of the fuse, presses forcibly with weight mounted on said pivot, a lever member 5 including a secondary weight on one end thereof freely pivoted on said segment. and means connecting said driving segment to said drive shaft for actuating the same, the other end or said lever having means thereon constructed and arranged to bear on said driving segment under centrifugal forces caused by rotation of said projectiie upon firing whereby both weights actuate the drive shaft, until said secondary weigiu swings said lever to a'maximum throw position said segment and primary weight moving thereafter on said pivot alone to actuate the drivc shaft whereby a substantially uniform drive ii effected.

mam-r JUNGHANS. 

